I have recently acquired land out East that will allow me to train at my leisure.

I plan on doing dynamic training (shooting/moving) to keep skills sharp. The calibers I'd be firing are 9mm, 7.62x39, and I'd be shooting a 12 gauge but don't know which shot to use to avoid potential splatter.

1) Is there a way to safely engage steel targets with these calibers while simultaneously keeping a relatively close distance?

2) I load #1 birdshot, is this safe to shoot steel with at those distances?